<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      ></el-alert>
      <!-- 进度条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                props.expandTrigger="hover"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTabDate"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTabDate"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals" placeholder=""></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action图片要上传到后台的地址 -->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">
                只能上传jpg/png文件，且不超过500kb
              </div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce">

            </quill-editor>
            <!-- 添加商品 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <span>
        <img :src="previewpath" alt=""  class="previewImg"/>
      </span>
    </el-dialog>
  </div>
</template>

<script>
// 局部导入lodash库  进行数据的深拷贝
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: "0",
      //   添加商品的表单数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce : '',
        attrs : [],
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输人商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输人商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输人商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输人商品数量", trigger: "blur" },
        ],
        goods_cat: [{ required: true, message: "请选择商品分类" }],
      },
      //   商品分类列表
      catelist: [],
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      // 动态参数列表数据
      manyTabDate: [],
      // 静态属性列表数据
      onlyTabDate: [],
      // 上传图片的地址
      uploadUrl: "http://127.0.0.1:8888/api/private/v1/upload",
      // 图片上传组件headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      previewpath: "",
      previewVisible: false,
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get(`categories`);
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败");
      }
      this.catelist = res.data;
      // console.log(this.catelist);
    },
    // 级联选择器选中项变化触发
    handleChange() {
      // console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    // 阻止标签页的切换
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开标签页的名字：' +oldActiveName );
      // console.log('即将进入标签页的名字：' +activeName );
      if (this.addForm.goods_cat.length !== 3 && oldActiveName === "0") {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    // 标签页切换
    async tabClicked() {
      // console.log(this.activeIndex);
      // 证明访问的是动态参数面板
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: "many",
            },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败");
        }
        // console.log(res.data);
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTabDate = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: "only",
            },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态属性列表失败");
        }
        this.onlyTabDate = res.data;
      }
    },
    // 处理图片预览事件
    handlePreview(file) {
      // console.log(file);
      this.previewpath = file.response.data.url;
      console.log(this.previewpath);
      this.previewVisible = true
    },
    // 处理移除图片的事件
    handleRemove(file) {
      // console.log(file);
      // 1.获取到将要删除图片的临时路径
      const filepath = file.response.data.tmp_path;
      // 2.从pics数组中，找到这个图片的索引值
      const i = this.addForm.pics.findIndex((x) => x.pic === filepath);
      // 3.调用数组的splice方法 把图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1);
      // console.log(this.addForm);
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      // console.log(response);
      // 1.先拼接得到一个图片信息对象
      // 2.将图片信息对象，push到pics数组中
      const picInfo = { pic: response.data.tmp_path };
      this.addForm.pics.push(picInfo);
      // console.log(this.addForm)
    },
    // 商品内容的添加商品点击事件
    add() {
      // console.log(this.addForm);
      this.$refs.addFormRef.validate(async valid => {
        if(!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 执行添加的业务逻辑
        // 由于商品分类数据绑定的必须是数组格式 需要在发起请求的时候进行goods_cat 深拷贝 然后操作深拷贝的数据进行,分割 进行请求
        // lodash cloneDeep(ojb)
        const newForm = _.cloneDeep(this.addForm)
        newForm.goods_cat = newForm.goods_cat.join(',')
        // 处理动态参数
        this.manyTabDate.forEach(item => {
          const newInfo = {
            attr_id : item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTabDate.forEach(item => {
          const newInfo = {
            attr_id : item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        newForm.attrs = this.addForm.attrs
        console.log(newForm);
        // 发起添加商品的请求 商品的名称必须是唯一的
        const {data:res} = await this.$http.post(`goods`,newForm)
        if(res.meta.status !==201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>

<style scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewImg{
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}
</style>
